Expand the following: 1). (2x+3y+4z)
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Step-by-step explanation:
(2 × x) + (3 × y) + (4 × 7)
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using (a+b-c)²=a²+b²+c²-2ab-2bc-2ca
=(2x+3y-4z)²
(2x)²+(3y)²+(4z)²+2(2x×3y)-2(3y×4z)-2(4z×2x)
4x²+9y²+16z²+12xy-24yz-16zx
l HOPE IT IS UNDERSTOOD
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